[Rootfs] Exclude some old ABIs from output of expand_* functions

This was [announced](https://discourse.julialang.org/t/psa-intent-to-deprecate-cxx03-libgfortran3-libgfortran4-abis/130799)
a few months ago and no one reacted, this implements the suggested changes.

Author: giordano

Project.toml

@@ -1,7 +1,7 @@
 name = "BinaryBuilderBase"
 uuid = "7f725544-6523-48cd-82d1-3fa08ff4056e"
 authors = ["Elliot Saba <[email protected]>"]
-version = "1.41.0"
+version = "1.42.0"
 
 [deps]
 Bzip2_jll = "6e34b625-4abd-537c-b88f-471c36dfa7a0"

src/Rootfs.jl

@@ -850,17 +850,8 @@ function expand_gfortran_versions(platform::AbstractPlatform)
         return [platform] #MSAN doesn't use libgfortran, it uses libflang
     end
 
-    # If this is an platform that has limited GCC support (such as aarch64-apple-darwin),
-    # the libgfortran versions we can expand to are similarly limited.
-    local libgfortran_versions
-    if Sys.isbsd(platform) && arch(platform) == "aarch64"
-        libgfortran_versions = [v"5"]
-    elseif arch(platform) == "riscv64"
-        # We don't have older GCC versions
-        libgfortran_versions = [v"5"]
-    else
-        libgfortran_versions = [v"3", v"4", v"5"]
-    end
+    # At the moment we only support libgfortran 5.
+    libgfortran_versions = [v"5",]
 
     # Create a new platform for each libgfortran version
     return map(libgfortran_versions) do v
@@ -899,8 +890,8 @@ function expand_cxxstring_abis(platform::AbstractPlatform; skip=Sys.isbsd)
         return [p]
     end
 
-    # Otherwise, generate new versions!
-    map(["cxx03", "cxx11"]) do abi
+    # Otherwise, generate new versions! At the moment we only support the C++11 string ABI.
+    map(["cxx11",]) do abi
         p = deepcopy(platform)
         p["cxxstring_abi"] = abi
         return p

test/rootfs.jl

@@ -6,23 +6,15 @@ using BinaryBuilderBase: RustBuild, CompilerShard
 @testset "Expand platforms" begin
     # expand_gfortran_versions
     @test expand_gfortran_versions(Platform("i686", "windows")) == [
-        Platform("i686", "windows"; libgfortran_version=v"3"),
-        Platform("i686", "windows"; libgfortran_version=v"4"),
         Platform("i686", "windows"; libgfortran_version=v"5"),
     ]
     @test expand_gfortran_versions([Platform("i686", "windows"), Platform("x86_64", "windows")]) == [
-        Platform("i686", "windows"; libgfortran_version=v"3"),
-        Platform("i686", "windows"; libgfortran_version=v"4"),
         Platform("i686", "windows"; libgfortran_version=v"5"),
-        Platform("x86_64", "windows"; libgfortran_version=v"3"),
-        Platform("x86_64", "windows"; libgfortran_version=v"4"),
         Platform("x86_64", "windows"; libgfortran_version=v"5"),
     ]
     @test expand_gfortran_versions([Platform("x86_64", "freebsd"; libgfortran_version=v"3")]) ==
         [Platform("x86_64", "freebsd"; libgfortran_version=v"3")]
     @test expand_gfortran_versions([Platform("x86_64", "macos"), Platform("aarch64", "macos")]) == [
-        Platform("x86_64",  "macos"; libgfortran_version=v"3"),
-        Platform("x86_64",  "macos"; libgfortran_version=v"4"),
         Platform("x86_64",  "macos"; libgfortran_version=v"5"),
         Platform("aarch64", "macos"; libgfortran_version=v"5"),
     ]
@@ -34,21 +26,17 @@ using BinaryBuilderBase: RustBuild, CompilerShard
 
     # expand_cxxstring_abis
     @test expand_cxxstring_abis(Platform("x86_64", "linux"; libc="musl")) == [
-        Platform("x86_64", "linux", libc="musl", cxxstring_abi="cxx03"),
         Platform("x86_64", "linux", libc="musl", cxxstring_abi="cxx11"),
     ]
     @test expand_cxxstring_abis([Platform("x86_64", "freebsd"), Platform("x86_64", "macos")]) == [
         Platform("x86_64", "freebsd"),
         Platform("x86_64", "macos"),
     ]
     @test expand_cxxstring_abis([Platform("x86_64", "freebsd"), Platform("x86_64", "macos")]; skip=_->false) == [
-        Platform("x86_64", "freebsd"; cxxstring_abi="cxx03"),
         Platform("x86_64", "freebsd"; cxxstring_abi="cxx11"),
-        Platform("x86_64", "macos"; cxxstring_abi="cxx03"),
         Platform("x86_64", "macos"; cxxstring_abi="cxx11"),
     ]
     @test expand_cxxstring_abis([Platform("x86_64", "freebsd"), Platform("x86_64", "linux")]; skip=Sys.islinux) == [
-        Platform("x86_64", "freebsd"; cxxstring_abi="cxx03"),
         Platform("x86_64", "freebsd"; cxxstring_abi="cxx11"),
         Platform("x86_64", "linux"),
     ]